get_sealed_ev

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnlyHint=true and openWorldHint=true. The description adds that it provides 'EV breakdown', reinforcing the read-only nature. No extra behavioral details beyond annotations are needed; the description does not contradict annotations.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is two short sentences, front-loaded with the purpose. Every word is necessary—no fluff or repetition. It is optimally concise for the complexity of the tool.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the tool has one parameter and an output schema (implied completeness), the description provides enough context: what it does, how the parameter is sourced. For a simple retrieval tool, this is adequate; missing details like the output format are handled by the output schema.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The schema only provides title and type for product_id (0% coverage). The description adds critical context that the ID comes from search_sealed, linking to a sibling tool and guiding parameter provenance. This compensates for the lack of schema descriptions.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the verb ('get EV breakdown') and the resource ('sealed product'), distinguishing it from siblings like search_sealed which searches for sealed products. The parameter reference to 'From search_sealed' further clarifies the tool's role.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description implies usage after search_sealed by stating the product_id comes from there. It provides clear context on when to use, though it does not explicitly mention when not to use or name alternatives. This is sufficient for a simple tool.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.